mortality/aging
• 1 of 13 mice died of unidentifiable causes following treatment with DMBA
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neoplasm
• 7 of 13 mice developed skin papillomas following treatment with DMBA compared to only 1 of 12 wild-type mice
• however, mice do not show altered susceptibility in terms of incidence or latency to skin cancer following TPA and DMBA treatment
• DMBA-induced tumors grow slowly but progressively and usually reach a size of more than 10 mm in diameter within 2-3 weeks after initial detection compared to tumors in wild-type mice that seem to be dormant and remain at about 2 to 3 mm in diameter after 2 months from initial detection
• DMBA-induced tumors also had more complicated structures with much thinner and more folded layers of squamous epithelium
• DMBA-induced tumors express less senescence markers than wild-type DMBA-induced tumors
• however, untreated mice are healthy and tumor-free for at least 2 years
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cellular
• mouse skin fibroblast cells derived from mice express less ras-induced senescence markers than wild-type DMBA-induced tumors
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integument
• 7 of 13 mice developed skin papillomas following treatment with DMBA compared to only 1 of 12 wild-type mice
• however, mice do not show altered susceptibility in terms of incidence or latency to skin cancer following TPA and DMBA treatment
• DMBA-induced tumors grow slowly but progressively and usually reach a size of more than 10 mm in diameter within 2-3 weeks after initial detection compared to tumors in wild-type mice that seem to be dormant and remain at about 2 to 3 mm in diameter after 2 months from initial detection
• DMBA-induced tumors also had more complicated structures with much thinner and more folded layers of squamous epithelium
• DMBA-induced tumors express less senescence markers than wild-type DMBA-induced tumors
• however, untreated mice are healthy and tumor-free for at least 2 years
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